Wheelchair Apparatus with Assistant Function

Abstract

The present invention provides a wheelchair apparatus with assistant function, comprising: a side frame set, comprising two side frames, a front horizontal shaft connecting pivotally between the two side frames, a sleeve set at the front end of the side frames, respectively, and a wheel set set on the side frames, respectively; two foot frame tubes, set in the sleeve, and having a gear-tooth segment; a seat frame set, comprising two seat frames, set above the side frame set, the front end of the seat frame set connecting pivotally with the side frame set, and a rear horizontal shaft connecting pivotally between the two seat frames; an extension mechanism, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively; one or more driving gear sets, set at the front of the side frames and driven linkedly by the front horizontal shaft; and one or more transmission gears, set pivotally at the front of the side frames, comprising a first arc gear-tooth part and a second arc gear-tooth part, the first arc gear-tooth part gearing to the driving gear set, the second arc gear-tooth part gearing to the gear-tooth segment, the first arc gear-tooth part homocentric with the second arc gear-tooth part, and the first arc gear-tooth part and second arc gear-tooth part being separated and having different radii. Thereby, the two driving gear sets and the two transmission gears can be used to extend the extension mechanism while lowering down the two foot frame tubes. Hence, the linking force will be less dispersed and the two foot frame tubes can be lowered with more smoothness. Accordingly, the safety of the wheelchair apparatus with assistant function can be improved.

1 . A wheelchair apparatus with assistant function, comprising:
 a side frame set, comprising two side frames, a front horizontal shaft connecting pivotally between the two side frames, a sleeve set at the front end of the side frames, respectively, and a wheel set set on the side frames, respectively;   two foot frame tubes, set in the sleeve, and having a gear-tooth segment;   a seat frame set, comprising two seat frames, set above the side frame set, the front end of the seat frame set connecting pivotally with the side frame set, and a rear horizontal shaft connecting pivotally between the two seat frames;   an extension mechanism, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively;   one or more driving gear sets, set at the front of the side frames and driven linkedly by the front horizontal shaft; and   one or more transmission gears, set pivotally at the front of the side frames, comprising a first arc gear-tooth part and a second arc gear-tooth part, the first arc gear-tooth part gearing to the driving gear set, the second arc gear-tooth part gearing to the gear-tooth segment, the first arc gear-tooth part homocentric with the second arc gear-tooth part, and the first arc gear-tooth part and second arc gear-tooth part being separated and having different radii.   
     
     
         2 . The wheelchair apparatus with assistant function of  claim 1 , wherein the radius of the second arc gear-tooth part is larger than that of the first arc gear-tooth part. 
     
     
         3 . The wheelchair apparatus with assistant function of  claim 1 , wherein a transmission-box base is set at the front end of the side frame and communicates with the sleeve, used for accommodating the driving gear set and the transmission gears, the driving gear set comprising a first gear and a second gear, the first gear set on the front horizontal shaft, the second gear gearing to the first arc gear-tooth part of the transmission gear, and the front horizontal shaft connecting pivotally on the transmission-box base. 
     
     
         4 . The wheelchair apparatus with assistant function of  claim 3 , wherein the transmission distance between the transmission gear and the gear-tooth segment is greater than that between the second gear and the transmission gear. 
     
     
         5 . The wheelchair apparatus with assistant function of  claim 1 , wherein a backrest frame is set pivotally to the rear of the seat frame set; an armrest is set on both sides of the backrest, respectively; and a control button is set at the front end of the armrest. 
     
     
         6 . The wheelchair apparatus with assistant function of  claim 1 , wherein an elastic part is set in the side frame, one end of the elastic part connecting inside the side frame, and the other end thereof being against the foot frame tube. 
     
     
         7 . The wheelchair apparatus with assistant function of  claim 1 , wherein the extension mechanism includes a retractable rod, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively, moved linkedly by a motor gear box, and the motor gear box being powered by a power supply. 
     
     
         8 . The wheelchair apparatus with assistant function of  claim 1 , wherein the extension mechanism includes a retractable rod, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively, the retractable rod being an air-pressure rod belonging to air pressure type, or a hydraulic-pressure rod belonging to hydraulic type. 
     
     
         9 . The wheelchair apparatus with assistant function of  claim 1 , wherein the extension mechanism further includes two retractable assistance rods, set between the front horizontal shaft and the rear horizontal shaft, and set on both sides of the retractable rod. 
     
     
         10 . A wheelchair apparatus with assistant function, comprising:
 a side frame set, comprising two side frames, a front horizontal shaft connecting pivotally between the two side frames, a sleeve set at the front end of the side frames, respectively, and a wheel set set on the side frames, respectively;   two foot frame tubes, set in the sleeve, and having a gear-tooth segment;   a seat frame set, comprising two seat frames, set above the side frame set, the front end of the seat frame set connecting pivotally with the side frame set, and a rear horizontal shaft connecting pivotally between the two seat frames;   an extension mechanism, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively;   one or more driving gear sets, set at the front of the side frames and driven linkedly by the front horizontal shaft; and   one or more transmission gears, set pivotally at the front of the side frames, comprising one or more first arcs and second arcs with different radii, the first arcs and the second arcs having gear teeth used for gearing to the driving gear set and the gear-tooth segment.   
     
     
         11 . The wheelchair apparatus with assistant function of  claim 10 , wherein the first arc and the second arc are homocentric. 
     
     
         12 . The wheelchair apparatus with assistant function of  claim 10 , wherein the radius of the second arc is greater than that of the first arc. 
     
     
         13 . The wheelchair apparatus with assistant function of  claim 10 , wherein a transmission-box base is set at the front end of the side frame and communicates with the sleeve, used for accommodating the driving gear set and the transmission gears, the driving gear set comprising a first gear and a second gear, the first gear set on the front horizontal shaft, the second gear gearing to the first arc gear-tooth part of the transmission gear, and the front horizontal shaft connecting pivotally on the transmission-box base. 
     
     
         14 . The wheelchair apparatus with assistant function of  claim 10 , wherein a backrest frame is set pivotally to the rear of the seat frame set; an armrest is set on both sides of the backrest, respectively; a control button is set at the front end of the armrest; and an elastic part is set in the side frame, one end of the elastic part connecting inside the side frame, and the other end thereof being against the foot frame tube. 
     
     
         15 . The wheelchair apparatus with assistant function of  claim 10 , wherein the extension mechanism includes a retractable rod, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively, moved linkedly by a motor gear box, and the motor gear box being powered by a power supply. 
     
     
         16 . The wheelchair apparatus with assistant function of  claim 10 , wherein the extension mechanism includes a retractable rod, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively, the retractable rod being an air-pressure rod belonging to air pressure type, or a hydraulic-pressure rod belonging to hydraulic type. 
     
     
         17 . The wheelchair apparatus with assistant function of  claim 10 , wherein the extension mechanism further includes two retractable assistance rods, set between the front horizontal shaft and the rear horizontal shaft, and set on both sides of the retractable rod. 
     
     
         18 . A wheelchair apparatus with assistant function, comprising:
 a side frame set, comprising two side frames, a front horizontal shaft connecting pivotally between the two side frames, a sleeve set at the front end of the side frames, respectively, and a wheel set set on the side frames, respectively;   two foot frame tubes, set in the sleeve, and having a gear-tooth segment;   a seat frame set, comprising two seat frames, set above the side frame set, the front end of the seat frame set connecting pivotally with the side frame set, and a rear horizontal shaft connecting pivotally between the two seat frames;   an extension mechanism, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively;   one or more driving gear sets, set at the front of the side frames and driven linkedly by the front horizontal shaft; and   one or more transmission gears, set pivotally at the front of the side frames, the transmission gear gearing to the gear-tooth segment and the second gear, and the transmission distance between the transmission gear being greater than that between the transmission gear and the second gear.   
     
     
         19 . The wheelchair apparatus with assistant function of  claim 18 , wherein the transmission gear comprises a first arc gear-tooth part and a second arc gear-tooth part, the first arc gear-tooth part gearing to the driving gear set, the second arc gear-tooth part gearing to the gear-tooth segment, the first arc gear-tooth part homocentric with the second arc gear-tooth part, and the first arc gear-tooth part and second arc gear-tooth part being separated and having different radii. 
     
     
         20 . The wheelchair apparatus with assistant function of  claim 18 , wherein the radius of the second arc gear-tooth part is larger than that of the first arc gear-tooth part; and an elastic part is set in the side frame, one end of the elastic part connecting inside the side frame, and the other end thereof being against the foot frame tube.